Our FLGS (Evolution Games) has a couple of rooms set aside for gaming (and is building more) with a modicum of noise abatement, and I thrill to the idea of having the walls painted with this stuff! I already bring a tabletop whiteboard for things like tracking initiative and putting up things for the players to remember.
It would also make a good surface for a mini-projector and a GMing aid like D20 Pro or Maptool.
While I'm talking about cool game aids, let me link you to Trainer's Warehouse, where I got these nifty little stands/clear plastic holders for signs, character tents, etc. For $7 plus shipping you get a sturdy little marble base and your choice of a holder (this is 8 1/2 x 11, but I got 5x7 for my character card.
In fact I got a whole bunch of 5x7 holders and I keep one with each of my characters with the character card in it. That way it's ready to go any time I play. They're pretty inexpensive, and work really well.